The rest of the software world hasn't collapsed into class action hell because people installed stuff they shouldn't have on their equipment, and it's had a few

The rest of the software world hasn't collapsed into class action hell because people installed stuff they shouldn't have on their equipment, and it's had a few decades to try. Why would we expect the iDevice ecosystem to do so now? The hypothetical lawsuits you describe don't seem very likely to succeed. No doubt a few people will complain, and then they'll discover the hard way that there is no technological cure for carelessness and whatever other platform they go to next will similarly be compromised if they are similarly careless about what they install on their equipment.